1Department of Pychiatry, Mt. Sinai Hospital and the University of Toronto, Toronto, Canada M5G 1X52Public Health Ontario and Departments of Family and Community Medicine and Dalla Lana School of Public Health, University of Toronto, Toronto, Canada M5G 1V23Sunnybrook Osler Centre for Prehospital Care, Toronto, Canada M4N 3M54Department of Psychology, Ryerson University, Toronto, Canada M5B 1X5

Received 26 January 2014; Accepted 10 April 2014; Published 4 May 2014